package org.andengine.entity.primitive.vbo;

import org.andengine.entity.primitive.Line;
import org.andengine.opengl.vbo.DrawType;
import org.andengine.opengl.vbo.HighPerformanceVertexBufferObject;
import org.andengine.opengl.vbo.VertexBufferObjectManager;
import org.andengine.opengl.vbo.attribute.VertexBufferObjectAttributes;

/**
 * (c) Zynga 2012
 *
 * @author Nicolas Gramlich <ngramlich@zynga.com>
 * @since 18:45:00 - 28.03.2012
 */
public class HighPerformanceLineVertexBufferObject extends HighPerformanceVertexBufferObject implements ILineVertexBufferObject {
    // ===========================================================
    // Constants
    // ===========================================================

    // ===========================================================
    // Fields
    // ===========================================================

    // ===========================================================
    // Constructors
    // ===========================================================

    public HighPerformanceLineVertexBufferObject(final VertexBufferObjectManager pVertexBufferObjectManager, final int pCapacity, final DrawType pDrawType, final boolean pAutoDispose, final VertexBufferObjectAttributes pVertexBufferObjectAttributes) {
        super(pVertexBufferObjectManager, pCapacity, pDrawType, pAutoDispose, pVertexBufferObjectAttributes);
    }

    // ===========================================================
    // Getter & Setter
    // ===========================================================

    // ===========================================================
    // Methods for/from SuperClass/Interfaces
    // ===========================================================

    @Override
    public void onUpdateColor(final Line pLine) {
        final float[] bufferData = this.mBufferData;

        final float packedColor = pLine.getColor().getABGRPackedFloat();

        bufferData[0 * Line.VERTEX_SIZE + Line.COLOR_INDEX] = packedColor;
        bufferData[1 * Line.VERTEX_SIZE + Line.COLOR_INDEX] = packedColor;

        this.setDirtyOnHardware();
    }

    @Override
    public void onUpdateVertices(final Line pLine) {
        final float[] bufferData = this.mBufferData;

        bufferData[0 * Line.VERTEX_SIZE + Line.VERTEX_INDEX_X] = 0;
        bufferData[0 * Line.VERTEX_SIZE + Line.VERTEX_INDEX_Y] = 0;

        bufferData[1 * Line.VERTEX_SIZE + Line.VERTEX_INDEX_X] = pLine.getX2() - pLine.getX1();
        bufferData[1 * Line.VERTEX_SIZE + Line.VERTEX_INDEX_Y] = pLine.getY2() - pLine.getY1();

        this.setDirtyOnHardware();
    }

    // ===========================================================
    // Methods
    // ===========================================================

    // ===========================================================
    // Inner and Anonymous Classes
    // ===========================================================
}